Transmission-hub.



U. APPLEBY.

TRANSMISSION HUB.

,QP-PLICATION FILED NOV. I1. 1915.

Patentesi July 9, 1918.

0- ieb 1W #731,031

26 Invenibr onvIL n APPLEZBY, or sen FRANCISCG, oaizrronma.

TRANSMISSION-HUB.

To all whom it may concern:

Be it known that I, OuviLLn Armrest, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in Transmission-Hubs, of which the following is a specification. y

In auto-trueks,vas at present constructed, it is always the case, so faras my knowledge extends, that the truck is designed only for acomparatively low speed, this low speed being necessary in order topropel the autotruck with an engine of moderate power. Especially isthis the case with auto-trucks which have been formed by conversion fromordinary motor cars. When converting a motor car into an auto-truck,reduction gear is employed to increase the power at the expense ofspeed. But it is often found as, for instance, when the load on'the caris but a light one or when the car is running on a very smooth road oron a downward incline, that the car can be run at a high. rate of speedwithout the expeiuiliture of great power. With the ordinary means forconverting a car into a motor truck, advantage cannot be taken of: theseconditions, for the reason that there is no way of recovering theincreased speed at the expense of the power.

One object of the present invention is to provide mechanism wherebyeither the speed of a motor car can be reduced with an increase ofpower, so that the car can serve as an auto-truck, or, if desired, thespeed relationcan remain unchanged, so that the con verted auto-truckcan be run at high speed.

A further object is to provide mechanism whereby a large number ofdifferent speeds maybe imparted to a motor car from the same power.

A further object of the invention is to provide a construction by whichthe main portion of the weight of the load of the car is thrown on theaxle housing, and not on the axle, as at present, thereby relieving theaxle of all strain, except that sustained in driving the car.

In the accom anvin drawin Fi urc 1 is a vertical'section of my improvedtransmission hub, Fig. 2 is a horizontal section thereof.

I Referring to the drawing, 1 indicates a spoke of a driving wheel of amotor car,

bolted, as shown at 2, to an outer drum 3 Specification of LettersI'atent.

Application filed November 11, 1916. Serial No. 130,895.

around a drum 1-, said drums forming a transmission casing. The innerdrum if n;

' v l E F secured by bolts 0 to the haring end or housing (3, saulhousing being also supp ed by a circular flange 7 around a ryhn "calinner portion 8 or the housing. .said housing extends the drinng axr,l'iHVlll" a tanerin end 10 contained within,

a L to v and keyed to, a tubular sliding-gear shat; 11, the outersurface oi which inguiar in form, here shown as square Will the or nersclnunt'ered. To the drum 1 is Tilt by pins 12 a' ring i i. havingiulerna teeth 1%. Antiriotion rolleas 15 are carried on rings 16 and areinterposed hetwctni the outer edge of the ring 1. 3 and the innersurface of the flange l? of the drum i, so that the drum 3 can rotatewithout friction relatively to the drum 1% supporting the axle.

Said drum 3 is extended to form a cylindrical cavity 18, which receivesa transmission device 19 in its neutral position, said device beingslidable on the sliding gear shaft 11, and eoi'nprising a large gearwheel 20 and a small gear wheel secured to gether by screws 2, whichalso Secure to the inner face of the gear wheel 20 a circular plate ordisk 23, the object o5 said dish being to hold in place a pusher plate2%, to which is screwed a pusher rod :25 extending through a hole in thedrum l parallel with the driying axle, and by which said transmissiondevice is shifted. when said transmission device is shifted inwardly,the teeth of its larger gear wheel 20 engage the teeth of a number ofidle pinions if; arrang equal intervals around the axle and inesl ngwith pinions .27, the pinions i 36 and 27 retating on roller hearings 28around stud shafts 25) screwed in said drum said pin ions 27 meshingwith the teeth oi" the iuternal gear ring 13 secured tothe drum 3.

By this nieans the speed of the wheel reduced one-halt, increasing thepower prow it 1 u fZLmesh with an internal gear wheel 31 formed in astill further reduced portion 32 of the drum 3,-said gear wheels 21 and31 "thus forming, in efl'ect, a clutch and causing the drum 3, and thewheelattached thereto,-

to rotate at the same speed as the axle, by

sliding gear'shaft 11, and therefore as the peed that -the shifters ofreason of the fact that the transmission device 1.9 still rotates at thesame speed as the same time, if desired, by merely shifting the gear,the original speed can-be employed at any time when suitable.

It 'is'desirable when making a change in the-two driving wheels beshifted not simultaneously but one slightly after'the other.

nisms which need not be hereinspecified can be employed for eflectingthis result;

The present mechanism-not only provides a simple and convenient, meansof conyer sion of the drivmg'mechamsm of an ordinary car into that of anauto-truclt eta.

' lower speed and also of reconversion into vantage that the main of theload" by the axle, thereby transmitted, through the transmis sionmechanism and the anti-friction wheels, to the hubs-and to the drivingWheels with out throwing any strain due to the load upon the axle. The'tLIltlfIlCiilOl'l rollers are in terposed between the drum tend thering 17, which is rigidly secured to the drum 3, to serve the purpose oftransmitting the load from one. drum to the other without anyfrictiontending to cause'loss of ower',

In order to permit the part of the rum 3 adjacent to the outer end ofthe sliding gear shaft to rotate relatively thereto with out unduefriction, ball bearings 33 are interposed therebetween and ball bearings34 are also interposed between .the \reduced portion of the drum 3 andthe nut 35 which is screwed upon the threaded end of the" axle and holdsthe wheel in place.

An important advantage of this invention is that the conversion can bemade by sim-' ply changing-the driving wheels and attaching the shiftmechanism and brakes, no other change being necessary.

I claim '1 1, In a transmission hub, the combination of an axle, ahousing therefor, a drum axisecured to said housing, a vehicle Wheelrotatable around the axle,"an internal gear wheel 'rotatable with thevehicle wheel, a slidablh gear Wheel around the axle an rotatabletherewith, means carried by the Many "mechabut at a slower moved intoengagement, means said housing,

the axle,

, anti-friction rollers housing for-transmitting motion from the gearwheel in 'its inner position to the. in-

ternal gear wheel'but at -a slower speed of rotation, devices secured-t0the gear wheel andwheel respectively to transmit motion of "an axle, ahousing therefor, a 4 axially secured to said housing, a Whole wheelrotatable around the axle, an internal gear wheel rotatable withthevehicle wheel,

direct to the wheel from the gear wheel'in,

a'slidable gear wheel around the axle and,

rotatable therewith, an id e gear wheel carried by the housing fortransmitting motion from the gear wheel in its inner position to theinternal gear wheel but at a slowerspeed of rotation, devices secured tothe gear wheel and wheel'respectively to'tra'nsmit motion direct-to thewheel; from the gear, wheel in" its outer position, and means forshifting said means.

3'. In a transmission hub, the combination v of am axle, a housingtherefor, a drum axially secured to said housing, a vehicle Wheelrotable around the axle, an internal gear wheel rotatable with thevehicle wheel,

- a slidable gear wheel around the axle and theoriginal speed, but ithas the great adportion of the weight of the car isnow carried, notbutby the axle'housing, and-is wheels carried by the housing fortransmitting motion from the gear wheel in its inner position to theinternal gear wheel speed of rotation, devices secured to the gear wheeland wheel respectively to transmit motion'direct to the wheel: from thegear wheel in its outer position, and means for shifting said means.

- 4 In combination, adriving axle, avehicle wheel driven thereby,ahousing for the axle, a drum secured to said housing, a secured waswheel, a ring secured t2) said drum and'having internal gear teeth,ant'ifricti'on rollers between the ringand the: drum. to which it is notsecured, a :sliding" gearshaft around said axle, a t ansmission deviceslidable on, but rotatable with, said slidinggear shaft comprising agear wheel, and a clutch memlo ried by saidsecond-named drum with whicher, a clutch member carsaid first clutch member is adapted tobe wheel isadapted to be moved into engagement,,for transmitting motion from saidgear wheel to said internal toothed ring, and

. means for shifting said transmission device.

driving axle, a ve the drum to which it i 's not secured, a slidingetween the ring and carried by and with which said gear gear shaftaround saidaxle,'a transmission,

device slidable on, but rotatable with, said sliding gear shaft,comprising a gear wheel and a clutch member, a clutch member carried bysaid second-named drum with which said first clutch member is adapted tobe moved into engagement, pairs of gear Wheels carried by said housing,and with which said gear wheel is adapted to be moved into engagement,for transmitting motion from said gear wheel to said internal toothedring, and means for shifting said transmission device.

6. The combination of a driving axle, a driven wheel, astationaryhousing for the axle, means slidable longitudinally relatively to theaxle for transmitting motion in one of its positions direct from theaxle to the wheel, and means carried by the housing forming a mediumthrough which said slidable means can transmit motion in another of itspositions indirectly from the axle to the wheel.

7. The combination of a driving axle, a

driven wheel, a stationary housing for the axle, an internal gear ringsecured to the wheel, a device slidable longitudinally relatively to theaxle for transmitting motion in one of its positions direct from theaxle 'to the wheel, and means supported by the housing for transmittingmotion in another of its positions indirectly to said gear ring.

8. The combination of a driving axle, a driven wheel, a stationaryhousing for the axle, an. internal gear ring secured to the wheel, adevice slidable longitudinally relatively to the axle for transmittingmotion in one of its positions direct from the axle to the wheel, a drumsecured to the housing surrounding said internal gear ring, antifrictionrollers between said drum and gear ring, and means supported by the drumfor transmitting motion from the axle to the gear ring by means of saidslidable means in another of its positions.

O. APPLEBY.

